Kate Middleton and Prince William welcomed a baby boy on July 22, 2013 at St. Mary's Hospital in London, England. Since then, the royal couple have released several pictures of the future king of England -- who is third in line for the throne, behind his father and Prince Charles.

Up And At 'Em!

Prince George made big moves while in Cirencester, England with his parents, the Duke and Duchess of Cambridge. The young royal stood tall, growing fast just weeks before his first birthday. George practiced walking with Kate holding his arms, while William played in a polo match nearby.